Mark pldm as a c++ project

pldm is not a [c++, c] project anymore, it was initially marked as a
c project as well , because of the libpldm component. Now that we have
the libpldm moved out of pldm into its own repository, we can safely
mark the pldm repo as a c++ project.

Change-Id: Id5a11faf8c3f69bfd837bdfd2fc92c5322bbe1bb
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/meson.build b/meson.build
index e722bec..22de2d4 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project(
     'pldm',
-    ['c', 'cpp'],
+    'cpp',
     version: '0.1',
     meson_version: '>=1.1.1',
     default_options: [
@@ -21,7 +21,7 @@
 
 # Disable FORTIFY_SOURCE when compiling with no optimization
 if (get_option('optimization') == '0')
-    add_project_arguments('-U_FORTIFY_SOURCE', language: ['cpp', 'c'])
+    add_project_arguments('-U_FORTIFY_SOURCE', language: 'cpp')
     message('Disabling FORTIFY_SOURCE as optimization is set to 0')
 endif
 
@@ -72,7 +72,7 @@
     conf_data.set('TERMINUS_ID', get_option('terminus-id'))
     conf_data.set('TERMINUS_HANDLE', get_option('terminus-handle'))
     conf_data.set('DBUS_TIMEOUT', get_option('dbus-timeout-value'))
-    add_project_arguments('-DLIBPLDMRESPONDER', language: ['c', 'cpp'])
+    add_project_arguments('-DLIBPLDMRESPONDER', language: 'cpp')
 endif
 if get_option('softoff').allowed()
     conf_data.set(
@@ -110,7 +110,7 @@
         '/usr/local/share/hostfw/alternate',
     )
     conf_data.set('DMA_MAXSIZE', get_option('oem-ibm-dma-maxsize'))
-    add_project_arguments('-DOEM_IBM', language: ['c', 'cpp'])
+    add_project_arguments('-DOEM_IBM', language: 'cpp')
 endif
 conf_data.set(
     'NUMBER_OF_REQUEST_RETRIES',