frameworks/native/opengl: Fix build with gcc 4.8

In gcc 4.8, the warning for unused parameters (such as JNIEnv* pointers
in JNI functions that don't need it) is enabled by default - causing
-Werror to break the build.

Change-Id: Ib91721f2cb9912b79c2ac19b4210b1309b08304f
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
diff --git a/opengl/tests/gl2_jni/Android.mk b/opengl/tests/gl2_jni/Android.mk
index 5d90ff6..25187c9 100644
--- a/opengl/tests/gl2_jni/Android.mk
+++ b/opengl/tests/gl2_jni/Android.mk
@@ -30,7 +30,7 @@
 # Optional tag would mean it doesn't get installed by default
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_CFLAGS := -Werror
+LOCAL_CFLAGS := -Werror -Wno-error=unused-parameter
 
 LOCAL_SRC_FILES:= \
   gl_code.cpp
diff --git a/opengl/tests/gl_jni/Android.mk b/opengl/tests/gl_jni/Android.mk
index 3d20e72..80b4bac 100644
--- a/opengl/tests/gl_jni/Android.mk
+++ b/opengl/tests/gl_jni/Android.mk
@@ -30,7 +30,7 @@
 # Optional tag would mean it doesn't get installed by default
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_CFLAGS := -Werror
+LOCAL_CFLAGS := -Werror -Wno-error=unused-parameter
 
 LOCAL_SRC_FILES:= \
   gl_code.cpp
diff --git a/opengl/tests/gl_perfapp/Android.mk b/opengl/tests/gl_perfapp/Android.mk
index 65e50e9..45a5516 100644
--- a/opengl/tests/gl_perfapp/Android.mk
+++ b/opengl/tests/gl_perfapp/Android.mk
@@ -33,7 +33,7 @@
 # Optional tag would mean it doesn't get installed by default
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_CFLAGS := -Werror
+LOCAL_CFLAGS := -Werror -Wno-error=unused-parameter
 
 LOCAL_SRC_FILES:= \
   gl_code.cpp
diff --git a/opengl/tests/gldual/Android.mk b/opengl/tests/gldual/Android.mk
index b4b378e..42094c8 100644
--- a/opengl/tests/gldual/Android.mk
+++ b/opengl/tests/gldual/Android.mk
@@ -30,7 +30,7 @@
 # Optional tag would mean it doesn't get installed by default
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_CFLAGS := -Werror
+LOCAL_CFLAGS := -Werror -Wno-error=unused-parameter
 
 LOCAL_SRC_FILES:= \
   gl_code.cpp