Add missing armv7 variants into the lists of allowed CPU types for the 'freestanding' stdlib builds (#65633)

Author: kubamracek

cmake/modules/SwiftSetIfArchBitness.cmake

@@ -14,6 +14,8 @@ function(set_if_arch_bitness var_name)
      "${SIA_ARCH}" STREQUAL "armv7" OR
      "${SIA_ARCH}" STREQUAL "armv7k" OR
      "${SIA_ARCH}" STREQUAL "arm64_32" OR
+     "${SIA_ARCH}" STREQUAL "armv7m" OR
+     "${SIA_ARCH}" STREQUAL "armv7em" OR
      "${SIA_ARCH}" STREQUAL "armv7s" OR
      "${SIA_ARCH}" STREQUAL "wasm32" OR
      "${SIA_ARCH}" STREQUAL "powerpc")

utils/swift_build_support/swift_build_support/targets.py

@@ -260,9 +260,10 @@ class StdlibDeploymentTarget(object):
 
     # A platform that's not tied to any particular OS, and it meant to be used
     # to build the stdlib as standalone and/or statically linked.
-    Freestanding = Platform("freestanding",
-                            archs=["i386", "x86_64", "armv7", "armv7s", "armv7k",
-                                   "arm64", "arm64e"])
+    Freestanding = Platform("freestanding", archs=[
+        "i386", "x86_64",
+        "armv7", "armv7s", "armv7k", "armv7m", "armv7em",
+        "arm64", "arm64e"])
 
     Linux = Platform("linux", archs=[
         "x86_64",