add compiler_rt ceilf/ceil/ceill

this should fix stage1 build error with msvc 2019

Author: jagt

lib/std/special/compiler_rt.zig

@@ -680,6 +680,10 @@ comptime {
         @export(floor, .{ .name = "floor", .linkage = linkage });
         @export(floorl, .{ .name = "floorl", .linkage = linkage });
 
+        @export(ceilf, .{ .name = "ceilf", .linkage = linkage });
+        @export(ceil, .{ .name = "ceil", .linkage = linkage });
+        @export(ceill, .{ .name = "ceill", .linkage = linkage });
+
         @export(fma, .{ .name = "fma", .linkage = linkage });
         @export(fmaf, .{ .name = "fmaf", .linkage = linkage });
         @export(fmal, .{ .name = "fmal", .linkage = linkage });
@@ -811,6 +815,19 @@ fn floorl(x: c_longdouble) callconv(.C) c_longdouble {
     return math.floor(x);
 }
 
+fn ceilf(x: f32) callconv(.C) f32 {
+    return math.ceil(x);
+}
+fn ceil(x: f64) callconv(.C) f64 {
+    return math.ceil(x);
+}
+fn ceill(x: c_longdouble) callconv(.C) c_longdouble {
+    if (!long_double_is_f128) {
+        @panic("TODO implement this");
+    }
+    return math.ceil(x);
+}
+
 // Avoid dragging in the runtime safety mechanisms into this .o file,
 // unless we're trying to test this file.
 pub fn panic(msg: []const u8, error_return_trace: ?*std.builtin.StackTrace) noreturn {