Fix undefined RPM macros

Always invoke the SPL_AC_DEBUG* macro's when running configure
so RPM_DEFINE_COMMON is correctly expanded.  A similar change
was already applied to ZFS.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes openzfs#703

config/spl-build.m4

@@ -17,9 +17,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
 	AC_SUBST(KERNELCPPFLAGS)
 
-	SPL_AC_DEBUG
-	SPL_AC_DEBUG_KMEM
-	SPL_AC_DEBUG_KMEM_TRACKING
 	SPL_AC_TEST_MODULE
 	SPL_AC_ATOMIC_SPINLOCK
 	SPL_AC_SHRINKER_CALLBACK
@@ -228,7 +225,9 @@ AC_DEFUN([SPL_AC_RPM], [
 		AC_MSG_RESULT([$HAVE_RPMBUILD])
 	])
 
-	RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1" --define "$(DEBUG_KMEM) 1" --define "$(DEBUG_KMEM_TRACKING) 1"'
+	RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1"'
+	RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM) 1"'
+	RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_TRACKING) 1"'
 	RPM_DEFINE_UTIL=
 	RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
 	RPM_DEFINE_KMOD+=' --define "_wrong_version_format_terminate_build 0"'

configure.ac

@@ -46,6 +46,9 @@ AC_PROG_LIBTOOL
 SPL_AC_LICENSE
 SPL_AC_PACKAGE
 SPL_AC_CONFIG
+SPL_AC_DEBUG
+SPL_AC_DEBUG_KMEM
+SPL_AC_DEBUG_KMEM_TRACKING
 
 AC_CONFIG_FILES([
 	Makefile