split patches into multiple files and add patch.sh

Author: redsun82

patch.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+PATCH_DIR="$(cd "$(dirname "$0")/patches"; pwd)"
+
+for patch_subdir in "$PATCH_DIR"/*; do
+  (
+    repo="$(basename "$patch_subdir")"
+    cd "$repo" || exit 0
+    echo "patching $repo"
+    for patch in "$patch_subdir"/*; do
+      echo "  applying $(basename "$patch")"
+      git apply "$patch"
+    done
+  )
+done

patches/swift/01-remove-assert-in-fallthrough-stmt.patch

@@ -0,0 +1,15 @@
+There are some cases when we extract bad ASTs where we hit this assertion if we compile in debug
+mode. This is undesirable.
+
+diff --git a/include/swift/AST/Stmt.h b/include/swift/AST/Stmt.h
+index 532e038c386..f013eee2f98 100644
+--- a/include/swift/AST/Stmt.h
++++ b/include/swift/AST/Stmt.h
+@@ -920,7 +920,6 @@ public:
+   /// Get the CaseStmt block to which the fallthrough transfers control.
+   /// Set during Sema.
+   CaseStmt *getFallthroughDest() const {
+-    assert(FallthroughDest && "fallthrough dest is not set until Sema");
+     return FallthroughDest;
+   }
+   void setFallthroughDest(CaseStmt *C) {

swift-build-system.patch renamed to patches/swift/02-handle-empty-pattern-list.patch

@@ -1,15 +1,6 @@
-diff --git a/include/swift/AST/Stmt.h b/include/swift/AST/Stmt.h
-index 532e038c386..f013eee2f98 100644
---- a/include/swift/AST/Stmt.h
-+++ b/include/swift/AST/Stmt.h
-@@ -920,7 +920,6 @@ public:
-   /// Get the CaseStmt block to which the fallthrough transfers control.
-   /// Set during Sema.
-   CaseStmt *getFallthroughDest() const {
--    assert(FallthroughDest && "fallthrough dest is not set until Sema");
-     return FallthroughDest;
-   }
-   void setFallthroughDest(CaseStmt *C) {
+`PatternBindingDecl::getPatternList()` can in some cases return an empty list, which causes a
+segmentation fault when getting the source range. This case needs to be handled for the extractor.
+
 diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
 index 75b99a22e73..09115678a82 100644
 --- a/lib/AST/Decl.cpp