Disable processing javac warnings

Set `-Xlint:-processing` to disable annotation processing warnings.
Required when building on JDK 1.8.0_20-b05 due to JDK-8039469.

Issue: SPR-11973
(cherry picked from commit ea16ce0)

Author: Phillip Webb

build.gradle

@@ -43,15 +43,15 @@ configure(allprojects) { project ->
 	compileJava.options*.compilerArgs = [
 		"-Xlint:serial", "-Xlint:varargs", "-Xlint:cast", "-Xlint:classfile",
 		"-Xlint:dep-ann", "-Xlint:divzero", "-Xlint:empty", "-Xlint:finally",
-		"-Xlint:overrides", "-Xlint:path", "-Xlint:processing", "-Xlint:static",
+		"-Xlint:overrides", "-Xlint:path", "-Xlint:-processing", "-Xlint:static",
 		"-Xlint:try", "-Xlint:fallthrough", "-Xlint:rawtypes", "-Xlint:deprecation",
 		"-Xlint:unchecked", "-Xlint:-options", "-Werror"
 	]
 
 	compileTestJava.options*.compilerArgs = [
 		"-Xlint:serial", "-Xlint:varargs", "-Xlint:cast", "-Xlint:classfile",
 		"-Xlint:dep-ann", "-Xlint:divzero", "-Xlint:empty", "-Xlint:finally",
-		"-Xlint:overrides", "-Xlint:path", "-Xlint:processing", "-Xlint:static",
+		"-Xlint:overrides", "-Xlint:path", "-Xlint:-processing", "-Xlint:static",
 		"-Xlint:try", "-Xlint:-fallthrough", "-Xlint:-rawtypes", "-Xlint:-deprecation",
 		"-Xlint:-unchecked", "-Xlint:-options"]