compiler: explicitly disable PIC in wasm32 NCG

This commit explicitly disables the ncgPIC flag for the wasm32 target.
The wasm backend doesn't support PIC for the time being.

(cherry picked from commit 87e34888)
(cherry picked from commit f46220a9)

compiler/GHC/Driver/Config/CmmToAsm.hs

@@ -21,7 +21,8 @@ initNCGConfig dflags this_mod = NCGConfig
    , ncgAsmContext            = initSDocContext dflags PprCode
    , ncgProcAlignment         = cmmProcAlignment dflags
    , ncgExternalDynamicRefs   = gopt Opt_ExternalDynamicRefs dflags
-   , ncgPIC                   = positionIndependent dflags
+   -- no PIC on wasm32 for now
+   , ncgPIC                   = positionIndependent dflags && not (platformArch (targetPlatform dflags) == ArchWasm32)
    , ncgInlineThresholdMemcpy = fromIntegral $ maxInlineMemcpyInsns dflags
    , ncgInlineThresholdMemset = fromIntegral $ maxInlineMemsetInsns dflags
    , ncgSplitSections         = gopt Opt_SplitSections dflags