Add RenderTextLinux Heapcheck and Valgrind suppressions.

Links to first failures after my CL: https://src.chromium.org/viewvc/chrome?view=rev&revision=180067
http://build.chromium.org/p/chromium.memory.fyi/builders/Linux%20Tests%20%28valgrind%29%282%29/builds/20475
http://build.chromium.org/p/chromium.memory.fyi/builders/Linux%20Heapcheck/builds/24259

I'm planning to suppress the errors in an impending CL.

BUG=173597
TEST=No unsuppressed RenderTextLinux leaks.
TBR=asvitkine@chromium.org,sky@chromium.org

Review URL: https://codereview.chromium.org/12153003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180106 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1846,3 +1846,22 @@
    ...
    fun:chromeos::MagnificationManagerTest_MagnificationObserver_Test::TestBody
 }
+{
+bug_173597_a
+Heapcheck:Leak
+fun:g_realloc
+fun:gfx::RenderTextTest_PangoAttributes_Test::TestBody
+}
+{
+bug_173597_b
+Heapcheck:Leak
+fun:??
+fun:gfx::RenderTextTest_PangoAttributes_Test::TestBody
+}
+{
+bug_173597_c
+Heapcheck:Leak
+fun:FcConfigEvaluate
+fun:gfx::RenderTextLinux::EnsureLayout
+fun:gfx::RenderTextTest_PangoAttributes_Test::TestBody
+}

tools/valgrind/memcheck/suppressions.txt

@@ -6565,3 +6565,22 @@
    fun:_ZN3gpu5gles2*Immediate4InitE*
    fun:_ZN3gpu5gles2*GLES2ImplementationTest_*_Test8TestBodyEv
 }
+{
+bug_173597_a
+Memcheck:Leak
+fun:malloc
+fun:g_malloc
+fun:g_slice_alloc
+fun:pango_attr_list_get_iterator
+fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
+}
+{
+bug_173597_b
+Memcheck:Leak
+fun:realloc
+fun:g_realloc
+fun:g_string_maybe_expand
+fun:g_string_insert_len
+fun:pango_font_description_to_string
+fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
+}