Cherry pick 2 more patches from the upstream

patches/greek_upper.patch

Index: patches/greek_upper.patch
diff --git a/patches/greek_upper.patch b/patches/greek_upper.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e957d3ee2285590d80ca543bb5550b5f85450edd
--- /dev/null
+++ b/patches/greek_upper.patch
@@ -0,0 +1,13 @@
+Index: source/common/ucasemap.cpp
+===================================================================
+--- source/common/ucasemap.cpp	(revision 39499)
++++ source/common/ucasemap.cpp	(revision 39500)
+@@ -200,7 +200,7 @@
+         return -1;  // integer overflow
+     }
+     int32_t limit=destIndex+length;
+-    if(limit<destCapacity) {
++    if(limit<=destCapacity) {
+         U8_APPEND_UNSAFE(dest, destIndex, c);
+     }
+     return limit;