Merge changes from topic "linux_glibc"

* changes:
  Rename target.linux[_x86[_64]] to target.linux_glibc[_x86[_64]]
  Move host flags from linux -> host
diff --git a/base/Android.bp b/base/Android.bp
index da262d2..0fd00ea 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -89,7 +89,7 @@
             cppflags: ["-Wexit-time-destructors"],
             enabled: true,
         },
-        linux: {
+        linux_glibc: {
             srcs: [
                 "chrono_utils.cpp",
                 "errors_unix.cpp",
@@ -135,7 +135,7 @@
                 misc_undefined: ["integer"],
             },
         },
-        linux: {
+        linux_glibc: {
             srcs: ["chrono_utils_test.cpp"],
         },
         windows: {
diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index 69d7b6d..2f20684 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -83,7 +83,7 @@
         darwin: {
             enabled: true,
         },
-        linux: {
+        linux_glibc: {
             srcs: libbacktrace_sources,
 
             shared_libs: [
@@ -135,7 +135,7 @@
     srcs: ["backtrace_testlib.cpp"],
 
     target: {
-        linux: {
+        linux_glibc: {
             shared_libs: [
                 "libunwind",
                 "libunwindstack",
@@ -231,7 +231,7 @@
                 "libutils",
             ],
         },
-        linux: {
+        linux_glibc: {
             host_ldlibs: [
                 "-lncurses",
             ],
diff --git a/libdiskconfig/Android.bp b/libdiskconfig/Android.bp
index 23a5c79..b92f086 100644
--- a/libdiskconfig/Android.bp
+++ b/libdiskconfig/Android.bp
@@ -23,7 +23,7 @@
         darwin: {
             enabled: false,
         },
-        linux: {
+        linux_glibc: {
             cflags: [
                 "-O2",
                 "-g",
diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index cf2ac4e..7ab6699 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -67,7 +67,7 @@
 
     target: {
         // Always disable optimizations for host to make it easier to debug.
-        linux: {
+        host: {
             cflags: ["-O0", "-g"],
         },
     },
diff --git a/libutils/Android.bp b/libutils/Android.bp
index 038fd73..30e6b49 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -121,7 +121,7 @@
             },
         },
 
-        linux: {
+        linux_glibc: {
             srcs: [
                 "Looper.cpp",
                 "ProcessCallStack.cpp",
diff --git a/libutils/tests/Android.bp b/libutils/tests/Android.bp
index 3fadef4..6911fc5 100644
--- a/libutils/tests/Android.bp
+++ b/libutils/tests/Android.bp
@@ -46,7 +46,7 @@
                 "libbase",
             ],
         },
-        linux: {
+        linux_glibc: {
             srcs: [
                 "Looper_test.cpp",
                 "RefBase_test.cpp",