GLES3: Fixed build.

src/glimports.h

@@ -542,6 +542,8 @@ GL_IMPORT_NV___(true,  PFNGLQUERYCOUNTERPROC,                      glQueryCounte
 GL_IMPORT      (true,  PFNGLINVALIDATEFRAMEBUFFERPROC,             glInvalidateFramebuffer, glDiscardFramebufferEXT);
 
 #	elif !BGFX_USE_GL_DYNAMIC_LIB
+GL_IMPORT______(true,  PFNGLGETSTRINGIPROC,                        glGetStringi);
+
 GL_IMPORT______(true,  PFNGLTEXIMAGE3DPROC,                        glTexImage3D);
 GL_IMPORT______(true,  PFNGLTEXSUBIMAGE3DPROC,                     glTexSubImage3D);
 GL_IMPORT______(true,  PFNGLCOMPRESSEDTEXIMAGE3DPROC,              glCompressedTexImage3D);