Implement command GetDateTime

This commit implements the GetDateTime command which is
defined in PLDM Bios Control and Configuration Specification.

Change-Id: Iced21bbad7be07d357b6885b1b1e03b07a3da165
Signed-off-by: Sampa Misra <sampmisr@in.ibm.com>
diff --git a/libpldm/Makefile.am b/libpldm/Makefile.am
index e778094..821f390 100644
--- a/libpldm/Makefile.am
+++ b/libpldm/Makefile.am
@@ -1,13 +1,15 @@
 nobase_include_HEADERS = \
 	base.h \
 	pldm_types.h \
-	platform.h
+	platform.h \
+	bios.h
 
 libpldm_LTLIBRARIES = libpldm.la
 libpldmdir = ${libdir}
 libpldm_la_SOURCES = \
 	base.c \
-	platform.c
+	platform.c \
+	bios.c
 libpldm_la_LDFLAGS = -version-info 1:0:0 -shared
 libpldm_la_CFLAGS = $(CODE_COVERAGE_CFLAGS)
 libpldm_la_LIBADD = $(CODE_COVERAGE_LIBS)