extern "C" unconditionally

This keeps older API levels from mangling GLESv3 entry points.

Change-Id: I5e751ca9f53f510d057693d368bc15c20f66e463
diff --git a/system/GLESv1_enc/gl_entry.cpp b/system/GLESv1_enc/gl_entry.cpp
index 2b7fa9f..0101e9d 100644
--- a/system/GLESv1_enc/gl_entry.cpp
+++ b/system/GLESv1_enc/gl_entry.cpp
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include "gl_client_context.h"
 
-#ifndef GL_TRUE
 extern "C" {
 	void glAlphaFunc(GLenum func, GLclampf ref);
 	void glClearColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
@@ -299,7 +298,6 @@
 	void glEndTilingQCOM(GLbitfield preserveMask);
 };
 
-#endif
 #ifndef GET_CONTEXT
 static gl_client_context_t::CONTEXT_ACCESSOR_TYPE *getCurrentContext = NULL;
 void gl_client_context_t::setContextAccessor(CONTEXT_ACCESSOR_TYPE *f) { getCurrentContext = f; }
diff --git a/system/GLESv2_enc/gl2_entry.cpp b/system/GLESv2_enc/gl2_entry.cpp
index 66c2246..5713921 100644
--- a/system/GLESv2_enc/gl2_entry.cpp
+++ b/system/GLESv2_enc/gl2_entry.cpp
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include "gl2_client_context.h"
 
-#ifndef GL_TRUE
 extern "C" {
 	void glActiveTexture(GLenum texture);
 	void glAttachShader(GLuint program, GLuint shader);
@@ -419,7 +418,6 @@
 	void glGetTexLevelParameteriv(GLenum target, GLint level, GLenum pname, GLint* params);
 };
 
-#endif
 #ifndef GET_CONTEXT
 static gl2_client_context_t::CONTEXT_ACCESSOR_TYPE *getCurrentContext = NULL;
 void gl2_client_context_t::setContextAccessor(CONTEXT_ACCESSOR_TYPE *f) { getCurrentContext = f; }
diff --git a/system/renderControl_enc/renderControl_entry.cpp b/system/renderControl_enc/renderControl_entry.cpp
index d33cf05..101806e 100644
--- a/system/renderControl_enc/renderControl_entry.cpp
+++ b/system/renderControl_enc/renderControl_entry.cpp
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include "renderControl_client_context.h"
 
-#ifndef GL_TRUE
 extern "C" {
 	GLint rcGetRendererVersion();
 	EGLint rcGetEGLVersion(EGLint* major, EGLint* minor);
@@ -44,7 +43,6 @@
 	uint32_t rcCreateColorBufferDMA(uint32_t width, uint32_t height, GLenum internalFormat, int frameworkFormat);
 };
 
-#endif
 #ifndef GET_CONTEXT
 static renderControl_client_context_t::CONTEXT_ACCESSOR_TYPE *getCurrentContext = NULL;
 void renderControl_client_context_t::setContextAccessor(CONTEXT_ACCESSOR_TYPE *f) { getCurrentContext = f; }