build: Move gvc submodule to /subprojects/gvc

When using the meson build system, gvc will be built as a subproject.
As meson restricts submodules to a subprojects/ directory in the
source tree root, move the submodule there.

https://bugzilla.gnome.org/show_bug.cgi?id=783229

.gitmodules

@@ -1,6 +1,6 @@
-[submodule "src/gvc"]
-	path = src/gvc
-	url = git://git.gnome.org/libgnome-volume-control
 [submodule "data/theme/gnome-shell-sass"]
 	path = data/theme/gnome-shell-sass
 	url = git://git.gnome.org/gnome-shell-sass
+[submodule "subprojects/gvc"]
+	path = subprojects/gvc
+	url = git://git.gnome.org/libgnome-volume-control

Makefile.am

@@ -1,7 +1,7 @@
 # Point to our macro directory and pick up user flags from the environment
 ACLOCAL_AMFLAGS  = -I m4 ${ACLOCAL_FLAGS}
 
-SUBDIRS = data js src  tests po docs
+SUBDIRS = data js subprojects/gvc src  tests po docs
 
 if BUILD_BROWSER_PLUGIN
 SUBDIRS += browser-plugin

autogen.sh

@@ -16,7 +16,7 @@ cd "${srcdir}"
 }
 
 # Fetch submodules if needed
-if test ! -f src/gvc/Makefile.am || test ! -f data/theme/gnome-shell-sass/COPYING;
+if test ! -f subprojects/gvc/Makefile.am || test ! -f data/theme/gnome-shell-sass/COPYING;
 then
   echo "+ Setting up submodules"
   git submodule init

configure.ac

@@ -259,7 +259,7 @@ AC_CONFIG_FILES([
   docs/reference/st/st-docs.sgml
   js/Makefile
   src/Makefile
-  src/gvc/Makefile
+  subprojects/gvc/Makefile
   browser-plugin/Makefile
   tests/Makefile
   po/Makefile.in

po/POTFILES.in

@@ -65,8 +65,6 @@ js/ui/windowAttentionHandler.js
 js/ui/windowManager.js
 js/ui/windowMenu.js
 src/calendar-server/evolution-calendar.desktop.in
-# Please do not remove this file from POTFILES.in. Run "git submodule init && git submodule update" to get it.
-src/gvc/gvc-mixer-control.c
 src/main.c
 src/shell-app.c
 src/shell-app-system.c
@@ -74,3 +72,5 @@ src/shell-global.c
 src/shell-keyring-prompt.c
 src/shell-polkit-authentication-agent.c
 src/shell-util.c
+# Please do not remove this file from POTFILES.in. Run "git submodule init && git submodule update" to get it.
+subprojects/gvc/gvc-mixer-control.c

src/Makefile.am

@@ -8,8 +8,6 @@ noinst_LTLIBRARIES =
 noinst_PROGRAMS =
 service_in_files =
 
-SUBDIRS = gvc
-
 -include $(INTROSPECTION_MAKEFILE)
 INTROSPECTION_GIRS =
 INTROSPECTION_SCANNER_ARGS = --warn-all --warn-error --add-include-path=$(srcdir) --add-include-path=$(MUTTER_GIR_DIR) -L$(MUTTER_TYPELIB_DIR)
@@ -287,6 +285,8 @@ shell-enum-types.c: $(srcdir)/shell-enum-types.c.in stamp-shell-enum-types.h
 	rm -f $(@F).tmp
 EXTRA_DIST += shell-enum-types.c.in
 
+gvcdir = $(top_builddir)/subprojects/gvc
+
 libgnome_shell_ldflags = -avoid-version
 libgnome_shell_libadd =		\
 	-lm			\
@@ -294,7 +294,7 @@ libgnome_shell_libadd =		\
 	libgnome-shell-menu.la	\
 	libst-1.0.la       	\
 	libtray.la		\
-	gvc/libgvc.la		\
+	$(gvcdir)/libgvc.la	\
 	$(NULL)
 
 libgnome_shell_menu_la_LDFLAGS = $(libgnome_shell_ldflags)

tests/run-test.sh.in

@@ -30,7 +30,7 @@ builddir=`cd $builddir && pwd`
 srcdir=@srcdir@
 srcdir=`cd $srcdir && pwd`
 
-GI_TYPELIB_PATH="$GI_TYPELIB_PATH${GI_TYPELIB_PATH:+:}@MUTTER_TYPELIB_DIR@:$builddir/../src:$builddir/../src/gvc"
+GI_TYPELIB_PATH="$GI_TYPELIB_PATH${GI_TYPELIB_PATH:+:}@MUTTER_TYPELIB_DIR@:$builddir/../src:$builddir/../subprojects/gvc"
 GJS_PATH="$srcdir:$srcdir/../js:$builddir/../js"
 GJS_DEBUG_OUTPUT=stderr
 $verbose || GJS_DEBUG_TOPICS="JS ERROR;JS LOG"