clutter: Add test .gitignore files

https://bugzilla.gnome.org/show_bug.cgi?id=768976

clutter/tests/accessibility/.gitignore

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+/cally-atkcomponent-example
+/cally-atkeditabletext-example
+/cally-atkevents-example
+/cally-atktext-example
+/cally-clone-example

clutter/tests/interactive/.gitignore

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+/stamp-test-interactive
+/stamp-test-unit-names
+/test-actors
+/test-animation
+/test-animator
+/test-bind-constraint
+/test-binding-pool
+/test-cairo-clock
+/test-cairo-flowers
+/test-clip
+/test-cogl-multitexture
+/test-cogl-offscreen
+/test-cogl-point-sprites
+/test-cogl-primitives
+/test-cogl-shader-arbfp
+/test-cogl-shader-glsl
+/test-cogl-tex-convert
+/test-cogl-tex-foreign
+/test-cogl-tex-getset
+/test-cogl-tex-polygon
+/test-cogl-tex-tile
+/test-cogl-vertex-buffer
+/test-content
+/test-devices
+/test-easing
+/test-events
+/test-fbo
+/test-grab
+/test-image
+/test-interactive
+/test-keyframe-transition
+/test-layout
+/test-multistage
+/test-paint-wrapper
+/test-path-constraint
+/test-pixmap
+/test-rotate-zoom
+/test-scale
+/test-script
+/test-scrolling
+/test-shader-effects
+/test-stage-read-pixels
+/test-stage-sizing
+/test-state
+/test-state-animator
+/test-state-script
+/test-swipe-action
+/test-table-layout
+/test-text
+/test-text-field
+/test-texture-async
+/test-texture-material
+/test-texture-quality
+/test-texture-slicing
+/test-touch-events
+/test-unit-names.h

clutter/tests/micro-bench/.gitignore

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+/test-cogl-perf
+/test-picking
+/test-random-text
+/test-text
+/test-text-perf

clutter/tests/performance/.gitignore

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+/test-picking
+/test-state
+/test-state-hidden
+/test-state-interactive
+/test-state-mini
+/test-state-pick
+/test-text-perf