pciutils: work around race condition in make install with high BR2_JLEVEL

Fixes http://autobuild.buildroot.net/results/908d7368c8dc8e320fd33f3193039f5925adc352

make install and install-lib can race against eachother causing 'install'
to fail. Work around it using MAKE1.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/pciutils/pciutils.mk

@@ -48,12 +48,12 @@ endef
 
 # Ditch install-lib if SHARED is an option in the future
 define PCIUTILS_INSTALL_TARGET_CMDS
-	$(MAKE) BUILDDIR=$(@D) -C $(@D) PREFIX=$(TARGET_DIR)/usr \
+	$(MAKE1) BUILDDIR=$(@D) -C $(@D) PREFIX=$(TARGET_DIR)/usr \
 		SHARED=$(PCIUTILS_SHARED) install install-lib
 endef
 
 define PCIUTILS_INSTALL_STAGING_CMDS
-	$(MAKE) BUILDDIR=$(@D) -C $(@D) PREFIX=$(STAGING_DIR)/usr \
+	$(MAKE1) BUILDDIR=$(@D) -C $(@D) PREFIX=$(STAGING_DIR)/usr \
 		SHARED=$(PCIUTILS_SHARED) install install-lib
 endef