Fix build failure due to missing forward declaration.

Strict compilation requires symbols used in template functions to have
been declared, which will be enforced in future compilers.

Bug swiftshader:103

Change-Id: Ibfc05011b1a2938e958dfacf6792477362699dc6
Reviewed-on: https://swiftshader-review.googlesource.com/18448
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

src/Common/Version.h

diff --git a/src/Common/Version.h b/src/Common/Version.h
index 074bf53..b9288d1 100644
--- a/src/Common/Version.h
+++ b/src/Common/Version.h
@@ -15,7 +15,7 @@
 #define MAJOR_VERSION 4
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 3
+#define BUILD_REVISION 4
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/OpenGL/libGL/Context.h

diff --git a/src/OpenGL/libGL/Context.h b/src/OpenGL/libGL/Context.h
index 10f4ae0..dbd0737 100644
--- a/src/OpenGL/libGL/Context.h
+++ b/src/OpenGL/libGL/Context.h
@@ -41,6 +41,8 @@
 	class Surface;
 	class Config;
 
+	void APIENTRY glVertexAttribArray(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* ptr);
+
 	class Command
 	{
 	public: