toolchain: configs: improve toolchain config readability

Add (or move) comment lines in toolchain-related Config.in files
to improve readability of the toolchain config section.

Source linux-headers/Config.in.host after toolchain-buildroot items.

For toolchain-buildroot case, the config file now looks like this:
*
* Toolchain
*

*
* Toolchain Buildroot Options
*

*
* Kernel Header Options
*

*
* uClibc Options
*

*
* Binutils Options
*

*
* GCC Options
*

*
* Host GDB Options
*

*
* Toolchain Generic Options
*

Signed-off-by: Petri Gynther <pgynther@google.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gdb/Config.in.host

@@ -1,3 +1,5 @@
+comment "Host GDB Options"
+
 config BR2_PACKAGE_HOST_GDB
 	bool "Build cross gdb for the host"
 	# When the external toolchain gdbserver is used, we shouldn't

package/linux-headers/Config.in.host

@@ -1,8 +1,8 @@
+comment "Kernel Header Options"
+
 config BR2_PACKAGE_HOST_LINUX_HEADERS
 	bool
 
-comment "Kernel Header Options"
-
 choice
 	prompt "Kernel Headers"
 	default BR2_KERNEL_HEADERS_AS_KERNEL if BR2_LINUX_KERNEL

package/uclibc/Config.in

@@ -1,12 +1,12 @@
 if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
 
+comment "uClibc Options"
+
 config BR2_PACKAGE_UCLIBC
 	bool
 	default y
 	select BR2_PACKAGE_LINUX_HEADERS
 
-comment "uClibc Options"
-
 config BR2_UCLIBC_CONFIG
 	string "uClibc configuration file to use?"
 	default "package/uclibc/uClibc-ng.config"

toolchain/toolchain-buildroot/Config.in

@@ -2,6 +2,8 @@
 
 if BR2_TOOLCHAIN_BUILDROOT
 
+comment "Toolchain Buildroot Options"
+
 config BR2_TOOLCHAIN_BUILDROOT_VENDOR
 	string "custom toolchain vendor name"
 	default "buildroot"
@@ -18,8 +20,6 @@ config BR2_TOOLCHAIN_BUILDROOT_VENDOR
 
 	  If you're not sure, just leave the default "buildroot" value.
 
-source "package/linux-headers/Config.in.host"
-
 choice
 	prompt "C library"
 	default BR2_TOOLCHAIN_UCLIBC
@@ -89,6 +89,7 @@ config BR2_TOOLCHAIN_BUILDROOT_LIBC
 	default "glibc"  if BR2_TOOLCHAIN_BUILDROOT_GLIBC
 	default "musl"	 if BR2_TOOLCHAIN_BUILDROOT_MUSL
 
+source "package/linux-headers/Config.in.host"
 source "package/linux-headers/Config.in"
 source "package/musl/Config.in"
 source "package/uclibc/Config.in"

toolchain/toolchain-common.in

@@ -5,6 +5,8 @@
 # so put it here instead
 source "package/gdb/Config.in.host"
 
+comment "Toolchain Generic Options"
+
 # https://sourceware.org/bugzilla/show_bug.cgi?id=19405
 config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_19405
 	bool

toolchain/toolchain-external/Config.in

@@ -1,5 +1,7 @@
 if BR2_TOOLCHAIN_EXTERNAL
 
+comment "Toolchain External Options"
+
 choice
 	prompt "Toolchain"