glapi: Don't search through subdirs from glapitable.h

Because meson won't put it in that folder.

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/mapi/glapi/tests/check_table.cpp

@@ -25,7 +25,7 @@
 #include "main/glheader.h"
 
 #include "glapi/glapi.h"
-#include "glapi/glapitable.h"
+#include "glapitable.h"
 
 struct name_offset {
    const char *name;

src/mesa/main/tests/Makefile.am

@@ -4,6 +4,8 @@ AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/gtest/include \
 	-I$(top_srcdir)/src \
 	-I$(top_srcdir)/src/mapi \
+	-I$(top_builddir)/src/mapi/glapi \
+	-I$(top_srcdir)/src/mapi/glapi \
 	-I$(top_builddir)/src/mesa \
 	-I$(top_srcdir)/src/mesa \
 	-I$(top_srcdir)/include \