Fix mac build more generically and cleaner.

Tests/elf_to_hex/Makefile

@@ -12,7 +12,7 @@ CFLAGS = -g  -o elf_to_hex  elf_to_hex.c -lelf
 
 ifeq ($(uname_S), Darwin)
     CC = clang++
-	APPLE_FLAGS = -I /opt/homebrew/lib -I /opt/homebrew/Cellar/libelf/0.8.13_1/include/
+    APPLE_FLAGS = -L /opt/homebrew/lib -I /opt/homebrew/include/libelf -I /opt/homebrew/include
 endif
 
 elf_to_hex: elf_to_hex.c
@@ -26,4 +26,4 @@ clean:
 
 .PHONY: full_clean
 full_clean:
-	rm  -f  *~  elf_to_hex
+	rm  -f  *~  elf_to_hex

Tests/elf_to_hex/elf_to_hex.c

@@ -43,15 +43,12 @@
 #include <inttypes.h>
 #include <string.h>
 #include <fcntl.h>
+#include <gelf.h>
 
 #ifdef __APPLE__
-#include <libelf/gelf.h>
 #include <vector>
-#else
-#include <gelf.h>
 #endif
 
-
 // ================================================================
 // Memory buffer into which we load the ELF file before
 // writing it back out to the output file.