Simplify toolchain config for linux (#357)

Motivation is to add loongarch64 support

Closes #357

COPYBARA_INTEGRATE_REVIEW=https://github.com/bazelbuild/rules_java/pull/357 from zhaixiaojuan:master 9cf1278223d5e518cbe94dcb17b394b85e065b9c
PiperOrigin-RevId: 925885213
Change-Id: Id14b277152d7d962bd3f8776c5dad0076819f9ad

toolchains/BUILD

diff --git a/toolchains/BUILD b/toolchains/BUILD
index 0f3ef2b..007b610 100644
--- a/toolchains/BUILD
+++ b/toolchains/BUILD
@@ -140,12 +140,7 @@
     hdrs = [":jni_header"] + select({
         "@bazel_tools//src/conditions:darwin": [":jni_md_header-darwin"],
         "@bazel_tools//src/conditions:freebsd": [":jni_md_header-freebsd"],
-        "@bazel_tools//src/conditions:linux_aarch64": [":jni_md_header-linux"],
-        "@bazel_tools//src/conditions:linux_mips64": [":jni_md_header-linux"],
-        "@bazel_tools//src/conditions:linux_ppc64le": [":jni_md_header-linux"],
-        "@bazel_tools//src/conditions:linux_riscv64": [":jni_md_header-linux"],
-        "@bazel_tools//src/conditions:linux_s390x": [":jni_md_header-linux"],
-        "@bazel_tools//src/conditions:linux_x86_64": [":jni_md_header-linux"],
+        "@bazel_tools//src/conditions:linux": [":jni_md_header-linux"],
         "@bazel_tools//src/conditions:openbsd": [":jni_md_header-openbsd"],
         "@bazel_tools//src/conditions:windows": [":jni_md_header-windows"],
         "//conditions:default": [],
@@ -153,12 +148,7 @@
     includes = ["include"] + select({
         "@bazel_tools//src/conditions:darwin": ["include/darwin"],
         "@bazel_tools//src/conditions:freebsd": ["include/freebsd"],
-        "@bazel_tools//src/conditions:linux_aarch64": ["include/linux"],
-        "@bazel_tools//src/conditions:linux_mips64": ["include/linux"],
-        "@bazel_tools//src/conditions:linux_ppc64le": ["include/linux"],
-        "@bazel_tools//src/conditions:linux_riscv64": ["include/linux"],
-        "@bazel_tools//src/conditions:linux_s390x": ["include/linux"],
-        "@bazel_tools//src/conditions:linux_x86_64": ["include/linux"],
+        "@bazel_tools//src/conditions:linux": ["include/linux"],
         "@bazel_tools//src/conditions:openbsd": ["include/openbsd"],
         "@bazel_tools//src/conditions:windows": ["include/win32"],
         "//conditions:default": [],