preserve inline line numbers during inlining

(cherry picked from commit a33cd07)
ref #13491

Author: vtjnash

base/inference.jl

@@ -2245,8 +2245,7 @@ function inlineable(f::ANY, e::Expr, atype::ANY, sv::StaticVarInfo, enclosing_as
     end
 
     body = Expr(:block)
-    body.args = filter(x->!((isa(x,Expr) && is(x.head,:line)) || isa(x,LineNumberNode)),
-                       ast.args[3].args::Array{Any,1})
+    body.args = ast.args[3].args::Array{Any,1}
     cost::Int = 1000
     if incompletematch
         cost *= 4