util-lib: move formats-util.h from shared/ to basic/

It's only a header file, definining format strings for basic system
types, hence it should be in src/basic/, not src/shared/.

Makefile.am

@@ -907,7 +907,8 @@ libbasic_la_SOURCES = \
 	src/basic/rm-rf.c \
 	src/basic/rm-rf.h \
 	src/basic/copy.c \
-	src/basic/copy.h
+	src/basic/copy.h \
+	src/basic/formats-util.h
 
 nodist_libbasic_la_SOURCES = \
 	src/basic/errno-from-name.h \
@@ -947,7 +948,6 @@ libshared_la_SOURCES = \
 	src/shared/architecture.h \
 	src/shared/efivars.c \
 	src/shared/efivars.h \
-	src/shared/formats-util.h \
 	src/shared/fstab-util.c \
 	src/shared/fstab-util.h \
 	src/shared/sleep-config.c \