Can't add the allocated section to elf file using inline assembly

[drug]

Using clang the following code:
```
__asm__ __volatile__ (
	".ifndef _.stapsdt.base\n"                                     \
	".pushsection .stapsdt.base,\"aG\",\"progbits\", .stapsdt.base, comdat\n" \
	".weak _.stapsdt.base\n"                                       \
	".hidden _.stapsdt.base\n"                                     \
	"_.stapsdt.base: .space 1\n"                                   \
	".size _.stapsdt.base,1\n"                                     \
	".popsection\n"                                                \
	".endif"
);
```
adds the allocated section to elf file:
```
$ clang source/sdt_expanded.c -ocsdt
$ readelf -x .stapsdt.base csdt

Hex dump of section '.stapsdt.base':
   0x000aa442 00                                  .

```
I translated this code to ldc:
```
__asm (
	.ifndef _.stapsdt.base
	.pushsection .stapsdt.base,\"aG\",\"progbits\", .stapsdt.base, comdat
	.weak _.stapsdt.base
	.hidden _.stapsdt.base
	_.stapsdt.base: .space 1
	.size _.stapsdt.base,1
	.popsection
	.endif`, ""
);
```
but ldc (1.18) do not add the section without any error.
```
$ dub --compiler=ldc2
$ readelf -x .stapsdt.base usdt
readelf: Warning: Section '.stapsdt.base' was not dumped because it does 
not exist!
```

If I make the section non allocated (removing `a` from \"aG\") then the 
section is added.
```
$ readelf -x .stapsdt.base usdt

Hex dump of section '.stapsdt.base':
   0x00000000 00                                  .
```
But this section needs to be allocated.

Is it a bug or I misuse something? Is there way to work around it?