Fixed time processing.

- arm64: Get TSC corresponding to boot time from IHK.

- x86_64: Calculate the current time using vdso.

Refs: #1186
Fujitsu: POSTK_DEBUG_ARCH_DEP_52
Change-Id: I293ba4bbe5390d50dea44b8a5b7471f59237daff

test/issues/1186/Makefile

@@ -0,0 +1,13 @@
+TARGET=C1186
+CC=gcc
+
+all:: $(TARGET)
+
+C1186: C1186.c
+	$(CC) -o C1186 C1186.c
+
+test:: $(TARGET)
+	sh ./C1186.sh
+
+clean::
+	rm -f *.o $(TARGET)