pkgconfig: add more .pc sample files. `abc,xyz` => `abc xyz` in `Requires:`

vlib/v/pkgconfig/pkgconfig.v

@@ -42,6 +42,10 @@ pub mut:
 	conflicts        []string
 }
 
+fn (mut pc PkgConfig) parse_list_no_comma(s string) []string {
+	return pc.parse_list( s.replace(',', ' ') )
+}
+
 fn (mut pc PkgConfig) parse_list(s string) []string {
 	operators := ['=', '<', '>', '>=', '<=']
 	r := pc.parse_line(s.replace('  ', ' ').replace(', ', ' ')).split(' ')
@@ -110,11 +114,11 @@ fn (mut pc PkgConfig) parse(file string) bool {
 			} else if line.starts_with('Version:') {
 				pc.version = pc.parse_line(line[8..])
 			} else if line.starts_with('Requires:') {
-				pc.requires = pc.parse_list(line[9..])
+				pc.requires = pc.parse_list_no_comma(line[9..])
 			} else if line.starts_with('Requires.private:') {
-				pc.requires_private = pc.parse_list(line[17..])
+				pc.requires_private = pc.parse_list_no_comma(line[17..])
 			} else if line.starts_with('Conflicts:') {
-				pc.conflicts = pc.parse_list(line[10..])
+				pc.conflicts = pc.parse_list_no_comma(line[10..])
 			} else if line.starts_with('Cflags:') {
 				pc.cflags = pc.parse_list(line[7..])
 			} else if line.starts_with('Libs:') {

vlib/v/pkgconfig/test_samples/gio-2.0.pc

@@ -0,0 +1,25 @@
+prefix=/usr
+libdir=${prefix}/lib/x86_64-linux-gnu
+includedir=${prefix}/include
+
+datadir=${prefix}/share
+schemasdir=${datadir}/glib-2.0/schemas
+bindir=${prefix}/bin
+giomoduledir=${libdir}/gio/modules
+gio=${bindir}/gio
+gio_querymodules=${bindir}/gio-querymodules
+glib_compile_schemas=${libdir}/glib-2.0/glib-compile-schemas
+glib_compile_resources=${bindir}/glib-compile-resources
+gdbus=${bindir}/gdbus
+gdbus_codegen=${bindir}/gdbus-codegen
+gresource=${bindir}/gresource
+gsettings=${bindir}/gsettings
+
+Name: GIO
+Description: glib I/O library
+Version: 2.64.3
+Requires: glib-2.0,gobject-2.0
+Requires.private: gmodule-no-export-2.0, zlib
+Libs: -L${libdir} -lgio-2.0
+Libs.private: -ldl -pthread -lresolv
+Cflags: -I${includedir}

vlib/v/pkgconfig/test_samples/gio-unix-2.0.pc

@@ -0,0 +1,9 @@
+prefix=/usr
+libdir=${prefix}/lib/x86_64-linux-gnu
+includedir=${prefix}/include
+
+Name: GIO unix specific APIs
+Description: unix specific headers for glib I/O library
+Version: 2.64.3
+Requires: gobject-2.0, gio-2.0
+Cflags: -I${includedir}/gio-unix-2.0

vlib/v/pkgconfig/test_samples/zlib.pc

@@ -0,0 +1,13 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${prefix}/lib/x86_64-linux-gnu
+sharedlibdir=${libdir}
+includedir=${prefix}/include
+
+Name: zlib
+Description: zlib compression library
+Version: 1.2.11
+
+Requires:
+Libs: -L${libdir} -L${sharedlibdir} -lz
+Cflags: -I${includedir}