lib: Move utilities to new directory common/utils.

Just code motion.

This commit makes it clearer what is a utility and what is part of the
library.  It also makes it clear that we should rename:

  guestfs-internal-frontend.h -> utils.h
  guestfs-internal-frontend-cleanups.h -> cleanups.h (?)

but this commit does not make that change.

Author: rwmjones

boot-analysis/Makefile.am

@@ -29,13 +29,14 @@ boot_analysis_SOURCES = \
 	boot-analysis-utils.h
 boot_analysis_CPPFLAGS = \
 	-I$(top_srcdir)/gnulib/lib -I$(top_builddir)/gnulib/lib \
+	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/src -I$(top_builddir)/src
 boot_analysis_CFLAGS = \
 	-pthread \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
 	$(PCRE_CFLAGS)
 boot_analysis_LDADD = \
-	$(top_builddir)/src/libutils.la \
+	$(top_builddir)/common/utils/libutils.la \
 	$(top_builddir)/src/libguestfs.la \
 	$(PCRE_LIBS) \
 	$(LIBXML2_LIBS) \

boot-benchmark/Makefile.am

@@ -31,12 +31,13 @@ boot_benchmark_SOURCES = \
 	../boot-analysis/boot-analysis-utils.h
 boot_benchmark_CPPFLAGS = \
 	-I$(top_srcdir)/gnulib/lib -I$(top_builddir)/gnulib/lib \
+	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/src -I$(top_builddir)/src \
 	-I$(top_srcdir)/utils/boot-analysis
 boot_benchmark_CFLAGS = \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS)
 boot_benchmark_LDADD = \
-	$(top_builddir)/src/libutils.la \
+	$(top_builddir)/common/utils/libutils.la \
 	$(top_builddir)/src/libguestfs.la \
 	$(LIBXML2_LIBS) \
 	$(LTLIBINTL) \

qemu-boot/Makefile.am

@@ -25,13 +25,14 @@ qemu_boot_SOURCES = \
 	qemu-boot.c
 qemu_boot_CPPFLAGS = \
 	-I$(top_srcdir)/gnulib/lib -I$(top_builddir)/gnulib/lib \
+	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/src -I$(top_builddir)/src \
 	-I$(top_srcdir)/df
 qemu_boot_CFLAGS = \
 	-pthread \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS)
 qemu_boot_LDADD = \
-	$(top_builddir)/src/libutils.la \
+	$(top_builddir)/common/utils/libutils.la \
 	$(top_builddir)/src/libguestfs.la \
 	$(LIBXML2_LIBS) \
 	$(LIBVIRT_LIBS) \

qemu-speed-test/Makefile.am

@@ -23,12 +23,13 @@ qemu_speed_test_SOURCES = \
 	qemu-speed-test.c
 qemu_speed_test_CPPFLAGS = \
 	-I$(top_srcdir)/gnulib/lib -I$(top_builddir)/gnulib/lib \
+	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/src -I$(top_builddir)/src \
 	-I$(top_srcdir)/df
 qemu_speed_test_CFLAGS = \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS)
 qemu_speed_test_LDADD = \
-	$(top_builddir)/src/libutils.la \
+	$(top_builddir)/common/utils/libutils.la \
 	$(top_builddir)/src/libguestfs.la \
 	$(LIBXML2_LIBS) \
 	$(LIBVIRT_LIBS) \