Use CLOCK_BOOTTIME also for amd64's time.now() in Go runtime

This change was missing in the original patch causing issues with
GoLang time functions on chromebooks after device wakes up from sleep
and leading to failed connections.

tunnel/tools/libwg-go/goruntime-boottime-over-monotonic.diff

@@ -26,7 +26,8 @@ Change-Id: I7b2a6ca0c5bc5fce57ec0eeafe7b68270b429321
  src/runtime/sys_linux_mipsx.s   | 2 +-
  src/runtime/sys_linux_ppc64x.s  | 2 +-
  src/runtime/sys_linux_s390x.s   | 2 +-
- 8 files changed, 12 insertions(+), 12 deletions(-)
+ src/runtime/time_linux_amd64.s  | 4 ++--
+ 9 files changed, 14 insertions(+), 14 deletions(-)
 
 diff --git a/src/runtime/sys_linux_386.s b/src/runtime/sys_linux_386.s
 index 12a294153d..17e3524b40 100644
@@ -165,7 +166,28 @@ index 1448670b91..7d2ee3231c 100644
 +	MOVW	$7, R2			// CLOCK_BOOTTIME
 
  	MOVD	R15, R7			// Backup stack pointer
-
--- 
-2.17.1
 
+diff --git a/src/runtime/time_linux_amd64.s b/src/runtime/time_linux_amd64.s
+index 1416d23230..8d42242505 100644
+--- a/src/runtime/time_linux_amd64.s
++++ b/src/runtime/time_linux_amd64.s
+@@ -46,7 +46,7 @@ noswitch:
+ 	JEQ	fallback
+ 	CALL	AX
+
+-	MOVL	$1, DI // CLOCK_MONOTONIC
++	MOVL	$7, DI // CLOCK_BOOTTIME
+ 	LEAQ	0(SP), SI
+ 	MOVQ	runtime·vdsoClockgettimeSym(SB), AX
+ 	CALL	AX
+@@ -79,7 +79,7 @@ fallback:
+ 	MOVQ	$SYS_clock_gettime, AX
+ 	SYSCALL
+
+-	MOVL	$1, DI // CLOCK_MONOTONIC
++	MOVL	$7, DI // CLOCK_BOOTTIME
+ 	LEAQ	0(SP), SI
+ 	MOVQ	$SYS_clock_gettime, AX
+ 	SYSCALL
+--
+2.43.0