xz: drop relative-pkg-config-paths patch for a SED

liblzma.pc is generated by a make rule that expands $(libdir) and
$(includedir) to absolute paths, which OpenWrt's pkg-config wrapper
cannot redirect at the staging directory. Rewrite the staged copy with
SED instead of patching the template, as ~50 other packages here do.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

utils/xz/Makefile

@@ -103,6 +103,9 @@ define Build/InstallDev
 	$(CP) \
 		$(PKG_INSTALL_DIR)/usr/lib/pkgconfig/liblzma.pc \
 		$(1)/usr/lib/pkgconfig/
+	$(SED) \
+		's,^libdir=.*,libdir=$$$${exec_prefix}/lib,;s,^includedir=.*,includedir=$$$${prefix}/include,' \
+		$(1)/usr/lib/pkgconfig/liblzma.pc
 endef
 
 define Package/xz-utils/install

utils/xz/patches/001-relative-pkg-config-paths.patch

@@ -1,13 +0,0 @@
---- a/src/liblzma/liblzma.pc.in
-+++ b/src/liblzma/liblzma.pc.in
-@@ -3,8 +3,8 @@
- 
- prefix=@prefix@
- exec_prefix=@exec_prefix@
--libdir=@libdir@
--includedir=@includedir@
-+libdir=${exec_prefix}/lib
-+includedir=${prefix}/include
- 
- Name: liblzma
- Description: General purpose data compression library