Merge changes from topic "ninja_static"

* changes:
  Fix crtend for musl static binaries
  Support static_executable: true for musl builds
  Use SystemSharedLibs as StaticLibs for static executables
diff --git a/cc/binary.go b/cc/binary.go
index 763d2b9..b423c50 100644
--- a/cc/binary.go
+++ b/cc/binary.go
@@ -156,6 +156,10 @@
 		}
 	}
 
+	if binary.static() {
+		deps.StaticLibs = append(deps.StaticLibs, deps.SystemSharedLibs...)
+	}
+
 	if ctx.toolchain().Bionic() {
 		if binary.static() {
 			if ctx.selectedStl() == "libc++_static" {
@@ -208,7 +212,7 @@
 func (binary *binaryDecorator) linkerInit(ctx BaseModuleContext) {
 	binary.baseLinker.linkerInit(ctx)
 
-	if !ctx.toolchain().Bionic() {
+	if !ctx.toolchain().Bionic() && !ctx.toolchain().Musl() {
 		if ctx.Os() == android.Linux {
 			// Unless explicitly specified otherwise, host static binaries are built with -static
 			// if HostStaticBinaries is true for the product configuration.
diff --git a/cc/config/x86_linux_host.go b/cc/config/x86_linux_host.go
index 25f5c58..ac5d5f7 100644
--- a/cc/config/x86_linux_host.go
+++ b/cc/config/x86_linux_host.go
@@ -107,7 +107,7 @@
 		"util",
 	}, "-l")
 
-	muslCrtBeginStaticBinary, muslCrtEndStaticBinary   = []string{"libc_musl_crtbegin_static"}, []string{"crtend_android"}
+	muslCrtBeginStaticBinary, muslCrtEndStaticBinary   = []string{"libc_musl_crtbegin_static"}, []string{"libc_musl_crtend"}
 	muslCrtBeginSharedBinary, muslCrtEndSharedBinary   = []string{"libc_musl_crtbegin_dynamic", "musl_linker_script"}, []string{"libc_musl_crtend"}
 	muslCrtBeginSharedLibrary, muslCrtEndSharedLibrary = []string{"libc_musl_crtbegin_so"}, []string{"libc_musl_crtend_so"}