emit YUL builtins debug line info and fix debug info source file (#358)

This PR fixes and enhances debug info generation:
1. Adds line information for each lowered YUL builtin and the `if`
statement.
2. Fixes the debug info source path to match the YUL file of the
contract dumped to the `--debug-output-dir`.

This improves inspection of the generated code a lot. Excerpt from
`llvm-objdump -Sl /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.so`:

```
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:203
;                 let _1 := memoryguard(0x80)
   13c3e: 3aa5b023      sd      a0, 0x3a0(a1)
   13c42: 38a5bc23      sd      a0, 0x398(a1)
   13c46: 38a5b823      sd      a0, 0x390(a1)
   13c4a: 08000513      li      a0, 0x80
   13c4e: 38a5b423      sd      a0, 0x388(a1)
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:204
;                 mstore(64, _1)
   13c52: 3885b503      ld      a0, 0x388(a1)
   13c56: 3905b603      ld      a2, 0x390(a1)
   13c5a: 3985b683      ld      a3, 0x398(a1)
   13c5e: 3a05b703      ld      a4, 0x3a0(a1)
   13c62: 38e5b023      sd      a4, 0x380(a1)
   13c66: 36d5bc23      sd      a3, 0x378(a1)
   13c6a: 36c5b823      sd      a2, 0x370(a1)
   13c6e: 36a5b423      sd      a0, 0x368(a1)
   13c72: 04000513      li      a0, 0x40
   13c76: 65d9          lui     a1, 0x16
   13c78: a605859b      addiw   a1, a1, -0x5a0
   13c7c: 95a6          add     a1, a1, s1
   13c7e: 00000097      auipc   ra, 0x0
   13c82: 000080e7      jalr    ra <__runtime+0x1de>

0000000000013c86 <.Lpcrel_hi27>:
; /tmp/dbg/contracts_EndpointV2.sol.EndpointV2.yul:205
;                 if iszero(lt(calldatasize(), 4))
   13c86: 00000517      auipc   a0, 0x0
   13c8a: 00053503      ld      a0, 0x0(a0)
   13c8e: 4108          lw      a0, 0x0(a0)
   13c90: 4591          li      a1, 0x4
   13c92: 06b56263      bltu    a0, a1, 0x13cf6 <.Lpcrel_hi27+0x70>
   13c96: a009          j       0x13c98 <.Lpcrel_hi27+0x12>
```

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/resolc/src/project/contract/mod.rs

@@ -77,7 +77,7 @@ impl Contract {
         project: Project,
         optimizer_settings: revive_llvm_context::OptimizerSettings,
         include_metadata_hash: bool,
-        debug_config: revive_llvm_context::DebugConfig,
+        mut debug_config: revive_llvm_context::DebugConfig,
         llvm_arguments: &[String],
         memory_config: SolcStandardJsonInputSettingsPolkaVMMemory,
     ) -> anyhow::Result<ContractBuild> {
@@ -117,6 +117,7 @@ impl Contract {
             _ => llvm.create_module(self.path.as_str()),
         };
 
+        debug_config.set_contract_path(&self.path);
         let mut context = revive_llvm_context::PolkaVMContext::new(
             &llvm,
             module,