[WebAssembly] Add a README.txt entry for mergeable sections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296095 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/WebAssembly/README.txt b/lib/Target/WebAssembly/README.txt
index 64991ad14071c0e1748f5aee08828e057e6f97e6..3be7007a57fe1e1a7b7a9c6abe0c3ce16bf1e2fe 100644 (file)
--- a/lib/Target/WebAssembly/README.txt
+++ b/lib/Target/WebAssembly/README.txt
@@ -145,3 +145,8 @@ WebAssemblyRegStackify could be extended, or possibly rewritten, to take
 advantage of the new opportunities.
 
 //===---------------------------------------------------------------------===//
+
+Add support for mergeable sections in the Wasm writer, such as for strings and
+floating-point constants.
+
+//===---------------------------------------------------------------------===//