apache: fixup apxs

apxs is used to get information about the apache installation when
building external modules. Currently there are issues:

1.

./staging_dir/target-mips_24kc_musl/usr/bin/apxs -q TARGET
apache2
apxs:Error: ./staging_dir/target-mips_24kc_musl/home/sk/tmp/openwrt/staging_dir/target-mips_24kc_musl/usr/bin/apr-1-config not found!.

This error is fixed by sed script #2.

2.

./staging_dir/target-mips_24kc_musl/usr/bin/apxs -q TARGET
cannot open ./staging_dir/target-mips_24kc_musl/home/sk/tmp/openwrt/staging_dir/target-mips_24kc_musl/usr/share/apache2/build/config_vars.mk: No such file or directory at ./staging_dir/target-mips_24kc_musl/usr/bin/apxs line 213.

This error is fixed by sed scipt #1.

Both sed scripts taken from buildroot (see [1]).

[1] https://github.com/buildroot/buildroot/blob/master/package/apache/apache.mk

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

net/apache/Makefile

@@ -282,6 +282,9 @@ define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/share/apache2/build
 	$(CP) $(PKG_INSTALL_DIR)/usr/share/apache2/build/* \
 				$(1)/usr/share/apache2/build
+	$(SED) 's%"/usr/bin"%"$(STAGING_DIR)/usr/bin"%' $(1)/usr/bin/apxs
+	$(SED) 's%/usr/share/apache2/build%$(STAGING_DIR)/usr/share/apache2/build%' \
+		$(1)/usr/bin/apxs
 	$(SED) 's%^prefix =.*%prefix = $(STAGING_DIR)/usr%' \
 		$(1)/usr/share/apache2/build/config_vars.mk
 endef