Fix broken default help strings for enable-shared, enable-static, and enable-fast-install. Regenerate configure script.

llvm-svn: 42066
diff --git a/llvm/configure b/llvm/configure
index 69ad990..42c3756 100755
--- a/llvm/configure
+++ b/llvm/configure
@@ -1542,12 +1542,12 @@
                           %a (default is YES)
   --enable-ltdl-install   install libltdl
   --enable-shared[=PKGS]  build shared libraries
-                          [default=enable_shared_default]
+                          [default=yes]
   --enable-static[=PKGS]  build static libraries
-                          [default=enable_static_default]
+                          [default=yes]
   --enable-fast-install[=PKGS]
                           optimize for fast installation
-                          [default=enable_Fast_install_default]
+                          [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
 
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