Don't require a strict revision match in LLDB.

For release-management purposes during development, LLDB's embedded Swift
compiler's version number can sometimes be off-by-one in the last digit
compared to the Swift compiler.

This patch restores the old behavior from before 17183629e4.

rdar://101299168

lib/Serialization/ModuleFileSharedCore.cpp

@@ -470,7 +470,7 @@ bool serialization::isSerializedAST(StringRef data) {
 
 ValidationInfo serialization::validateSerializedAST(
     StringRef data, bool requiresOSSAModules, StringRef requiredSDK,
-    ExtendedValidationInfo *extendedInfo,
+    bool requiresRevisionMatch, ExtendedValidationInfo *extendedInfo,
     SmallVectorImpl<SerializationOptions::FileDependency> *dependencies) {
   ValidationInfo result;
 
@@ -512,7 +512,7 @@ ValidationInfo serialization::validateSerializedAST(
       result = validateControlBlock(
           cursor, scratch,
           {SWIFTMODULE_VERSION_MAJOR, SWIFTMODULE_VERSION_MINOR},
-          requiresOSSAModules, /*requiresRevisionMatch=*/true,
+          requiresOSSAModules, requiresRevisionMatch,
           requiredSDK,
           extendedInfo, localObfuscator);
       if (result.status == Status::Malformed)