Unrecognised configure option fix

The keyword "buildtype" is misgiven as "build".
Jenkins treats this error as warning and continues with the default buildtype=debug;
where this error is caught while bitbaking and the openpower-vpd-parser compilation fails.

This commit fixes the issue by replacing "build" with "buildtype" keyword.

Signed-off-by: PriyangaRamasamy <priyanga24@in.ibm.com>
Change-Id: I44dc63ed18971d59961bc1e1c4f92fef0ea25cf6
diff --git a/meson.build b/meson.build
index 548f5ae..d5080b3 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@
        'warning_level=3',
        'werror=true',
        'cpp_std=c++17',
-       'build=debugoptimized'
+       'buildtype=debugoptimized'
      ],
      version: '1.0'
 )