meson: adjust nlohmann-json dependency

Simplify the meson directive for nlohmann-json dependency and rename the
wrap file to align with other repositories.

Signed-off-by: Patrick Williams <[email protected]>
Change-Id: I6ad9d4fe3e8fa24673b736bab81e2fcabc51f1a0

Author: williamspatrick

extensions/openpower-pels/meson.build

@@ -3,11 +3,7 @@ libpldm_dep = dependency(
     default_options: ['oem-ibm=enabled'],
 )
 
-if cpp.has_header('nlohmann/json.hpp')
-    nlohmann_json_dep = declare_dependency()
-else
-    nlohmann_json_dep = dependency('nlohmann-json')
-endif
+nlohmann_json_dep = dependency('nlohmann_json', include_type: 'system')
 
 python_inst = import('python').find_installation('python3')
 python_ver = python_inst.language_version()

subprojects/nlohmann-json.wrap

@@ -0,0 +1,6 @@
+[wrap-git]
+revision = HEAD
+url = https://github.com/nlohmann/json.git
+
+[provide]
+nlohmann_json = nlohmann_json_dep