Merge pull request #27 from leytou/fix_install build: meson: add install file 'lc3_cpp.h'

diff --git a/src/meson.build b/src/meson.build
index 8f4ccec..007573b 100644
--- a/src/meson.build
+++ b/src/meson.build

@@ -36,7 +36,13 @@
 		soversion: 1,
 		install: true)
 
-install_headers('../include/lc3.h', '../include/lc3_private.h')
+lc3_install_headers = [
+	'../include/lc3_private.h',
+	'../include/lc3.h',
+	'../include/lc3_cpp.h'
+]
+
+install_headers(lc3_install_headers)
 
 pkg_mod = import('pkgconfig')