Prioritize build_dir for generated headers (#47783)

(cherry picked from commit 0feaf5c)

Author: vchuravy

src/julia.h

@@ -4,7 +4,9 @@
 #define JULIA_H
 
 #ifdef LIBRARY_EXPORTS
-#include "jl_internal_funcs.inc"
+// Generated file, needs to be searched in include paths so that the builddir
+// retains priority
+#include <jl_internal_funcs.inc>
 #undef jl_setjmp
 #undef jl_longjmp
 #undef jl_egal
@@ -2140,7 +2142,7 @@ JL_DLLEXPORT int jl_generating_output(void) JL_NOTSAFEPOINT;
 #define JL_OPTIONS_USE_COMPILED_MODULES_NO 0
 
 // Version information
-#include "julia_version.h"
+#include <julia_version.h> // Generated file
 
 JL_DLLEXPORT extern int jl_ver_major(void);
 JL_DLLEXPORT extern int jl_ver_minor(void);

src/julia_internal.h

@@ -1541,7 +1541,9 @@ JL_DLLEXPORT uint16_t julia__truncdfhf2(double param) JL_NOTSAFEPOINT;
 #endif
 
 #ifdef USE_DTRACE
-#include "uprobes.h.gen"
+// Generated file, needs to be searched in include paths so that the builddir
+// retains priority
+#include <uprobes.h.gen>
 
 // uprobes.h.gen on systems with DTrace, is auto-generated to include
 // `JL_PROBE_{PROBE}` and `JL_PROBE_{PROBE}_ENABLED()` macros for every probe