mesa: Move the common _mesa_glsl_compile_shader() code to glsl/.

This code had no relation to ir_to_mesa.cpp, since it was also used by
intel and state_tracker, and most of it was duplicated with the standalone
compiler (which has periodically drifted from the Mesa copy).

v2: Split from the ir_to_mesa to shaderapi.c changes.

Acked-by: Paul Berry <stereotype441@gmail.com> (v1)
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/glsl/program.h

@@ -24,15 +24,27 @@
 
 #include "main/core.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void
+_mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
+			  bool dump_ast, bool dump_hir);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
 extern void
 link_shaders(struct gl_context *ctx, struct gl_shader_program *prog);
 
 extern void
-linker_error(gl_shader_program *prog, const char *fmt, ...)
+linker_error(struct gl_shader_program *prog, const char *fmt, ...)
    PRINTFLIKE(2, 3);
 
 extern void
-linker_warning(gl_shader_program *prog, const char *fmt, ...)
+linker_warning(struct gl_shader_program *prog, const char *fmt, ...)
    PRINTFLIKE(2, 3);
 
 extern long