util: move declarations out of qemu-common.h

Move declarations out of qemu-common.h for functions declared in
utils/ files: e.g. include/qemu/path.h for utils/path.c.
Move inline functions out of qemu-common.h and into new files (e.g.
include/qemu/bcd.h)

Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/util/unicode.c b/util/unicode.c
index 524dca8..a812a35 100644
--- a/util/unicode.c
+++ b/util/unicode.c
@@ -11,7 +11,7 @@
  */
 
 #include "qemu/osdep.h"
-#include "qemu-common.h"
+#include "qemu/unicode.h"
 
 /**
  * mod_utf8_codepoint: