Add silver searcher (aka 'ag') recipe.

Still needs a proper Makefile patch to fix -lpthread

sys-apps/the_silver_searcher/the_silver_searcher-0.17.recipe

@@ -0,0 +1,80 @@
+SUMMARY="A code-searching tool similar to ack, but faster."
+DESCRIPTION="A code-searching tool similar to ack, but faster."
+HOMEPAGE="https://github.com/ggreer/the_silver_searcher/"
+SRC_URI="git+https://github.com/ggreer/the_silver_searcher.git#0.17"
+CHECKSUM_MD5=""
+COPYRIGHT="2013 Geoff Greer"
+LICENSE="Apache v2"
+REVISION="1"
+ARCHITECTURES="x86"
+if [ $effectiveTargetArchitecture != x86_gcc2 ];then
+	ARCHITECTURES="$ARCHITECTURES x86_gcc2"
+else
+	ARCHITECTURES="$ARCHITECTURES !x86_gcc2"
+fi
+SECONDARY_ARCHITECTURES="x86"
+SOURCE_DIR=""
+
+# On x86_gcc2 we don't want to install the commands in bin/<arch>/, but in bin/.
+commandSuffix=$secondaryArchSuffix
+commandBinDir=$binDir
+if [ "$targetArchitecture" = x86_gcc2 ]; then
+    commandSuffix=
+    commandBinDir=$prefix/bin
+fi
+
+PROVIDES="
+	the_silver_searcher$secondaryArchSuffix = $portVersion
+	cmd:ag$commandSuffix = $portVersion
+	"
+
+REQUIRES="
+	haiku$secondaryArchSuffix >= $haikuVersion
+	lib:liblzma${secondaryArchSuffix}
+	lib:libpcre${secondaryArchSuffix}
+	lib:libz${secondaryArchSuffix}
+	"
+
+BUILD_REQUIRES="
+	devel:liblzma${secondaryArchSuffix}
+	devel:libpcre${secondaryArchSuffix}
+	devel:libz${secondaryArchSuffix}
+	"
+
+BUILD_PREREQUIRES="
+	haiku${secondaryArchSuffix}_devel >= $haikuVersion
+	cmd:aclocal
+	cmd:autoconf
+	cmd:autoheader
+	cmd:automake
+	cmd:make
+	cmd:gcc${secondaryArchSuffix}
+	cmd:pkg_config
+	"
+
+PATCH()
+{
+	sed -i 's,-lpthread,,' Makefile.am
+}
+
+BUILD()
+{
+	aclocal
+	autoconf
+	autoheader
+	automake --add-missing
+
+	#Need to override the pkgconfig variables
+	LZMA_CFLAGS="-I$includeDir" \
+	LZMA_LIBS="-L$libDir -llzma" \
+	PCRE_CFLAGS="-I$includeDir" \
+	PCRE_LIBS="-L$libDir -lpcre" \
+	runConfigure --omit-dirs binDir ./configure \
+	--bindir=$commandBinDir
+	make
+}
+
+INSTALL()
+{
+	make install
+}