Add alternate srg path (FG changes)

build.gradle

@@ -92,15 +92,16 @@ if (System.env.GRADLE_USER_HOME) {
 }
 ext.mappingsPath = homeDir + 'caches/minecraft/de/oceanlabs/mcp/mcp_' + mappings_channel + '/' + mappings_version + '/'
 ext.srgPath = mappingsPath + 'srgs/notch-srg.srg'
+ext.altSrgPath = mappingsPath + "$mcVersion/srgs/notch-srg.srg"
 
 jar.doFirst {
 	if (
 	!file(mappingsPath + 'fields.csv').exists() ||
 		!file(mappingsPath + 'methods.csv').exists() ||
 		!file('./generated/extendsMap.obj').exists() ||
-		!file(srgPath).exists()
+		(!file(srgPath).exists() && !file(altSrgPath).exists())
 	)
-		throw new Error("Can't find mappings at $mappingsPath and/or $srgPath and/or extendsMap")
+		throw new Error("Can't find mappings at $mappingsPath and/or $srgPath and/or $altSrgPath and/or extendsMap")
 }
 
 jar {
@@ -111,6 +112,7 @@ jar {
 		exclude "META-INF/**"
 	}
 	from srgPath
+	from altSrgPath
 	from mappingsPath + 'methods.csv'
 	from mappingsPath + 'fields.csv'
 	from './generated/extendsMap.obj'