gdb: let configure auto-detect in-process agent support

Stop explicitly enabling --enable-inprocess-agent. GDB's configure
already defaults to disabling IPA on platforms without an
implementation (like RISC-V and LoongArch64), so forcing it on just
breaks the build there. Only pass --disable-inprocess-agent for
static builds, where it can never work.

pkgs/by-name/gd/gdb/package.nix

@@ -193,10 +193,8 @@ stdenv.mkDerivation (finalAttrs: {
     (withFeatureAs true "auto-load-safe-path" (builtins.concatStringsSep ":" safePaths))
     (withFeature enableDebuginfod "debuginfod")
     (enableFeature (!stdenv.hostPlatform.isMusl) "nls")
-    (enableFeature (
-      !stdenv.hostPlatform.isStatic && !stdenv.hostPlatform.isLoongArch64
-    ) "inprocess-agent")
   ]
+  ++ optional stdenv.hostPlatform.isStatic "--disable-inprocess-agent"
   ++ optional (!hostCpuOnly) "--enable-targets=all"
   # Workaround for Apple Silicon, "--target" must be "faked", see eg: https://github.com/Homebrew/homebrew-core/pull/209753
   ++ optional (