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/qga/commands-posix.c b/qga/commands-posix.c
index 9f51fae..2ae3725 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -23,6 +23,7 @@
 #include "qemu/host-utils.h"
 #include "qemu/sockets.h"
 #include "qemu/base64.h"
+#include "qemu/cutils.h"
 
 #ifndef CONFIG_HAS_ENVIRON
 #ifdef __APPLE__