palace: add a dependency on c (spack#48315)

Author: alalazo

var/spack/repos/builtin/packages/palace/package.py

@@ -19,7 +19,8 @@ class Palace(CMakePackage):
     version("0.12.0", tag="v0.12.0", commit="8c192071206466638d5818048ee712e1fada386f")
     version("0.11.2", tag="v0.11.2", commit="6c3aa5f84a934a6ddd58022b2945a1bdb5fa329d")
 
-    depends_on("cxx", type="build")  # generated
+    depends_on("c", type="build")
+    depends_on("cxx", type="build")
 
     variant("shared", default=True, description="Build shared libraries")
     variant("int64", default=False, description="Use 64 bit integers")