osmesa: Include generated headers without path

This makes things much easier to ensure correctness with meson. Tested
with make dist-check and with meson.

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

src/mesa/drivers/osmesa/Makefile.am

@@ -30,6 +30,8 @@ AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/gallium/auxiliary \
 	-I$(top_builddir)/src/mapi \
 	-I$(top_srcdir)/src/mapi \
+	-I$(top_builddir)/src/mapi/glapi \
+	-I$(top_srcdir)/src/mapi/glapi \
 	-I$(top_srcdir)/src/mesa/ \
 	$(DEFINES)
 AM_CFLAGS = $(PTHREAD_CFLAGS) \

src/mesa/drivers/osmesa/osmesa.c

@@ -1291,7 +1291,7 @@ OSMesaPostprocess(OSMesaContext osmesa, const char *filter,
 #define GL_GLEXT_PROTOTYPES
 #include "GL/gl.h"
 #include "glapi/glapi.h"
-#include "glapi/glapitable.h"
+#include "glapitable.h"
 
 #if defined(USE_MGL_NAMESPACE)
 #define NAME(func)  mgl##func
@@ -1307,6 +1307,6 @@ OSMesaPostprocess(OSMesaContext osmesa, const char *filter,
 
 /* skip normal ones */
 #define _GLAPI_SKIP_NORMAL_ENTRY_POINTS
-#include "glapi/glapitemp.h"
+#include "glapitemp.h"
 
 #endif /* GLX_INDIRECT_RENDERING */