`--print-memory-usage` equivalent flag for LLD

[Prabhuk]

--print-memory-usage flag in GNU ld gives a breakdown of the memory used in each of the memory regions defined in the linker file.

Having this feature will be useful in understanding the size impact especially in embedded systems and constrained targets.

[llvmbot]

@llvm/issue-subscribers-clang-driver

[wjjsn]

try this，it can works!
add_link_options(
-Wl,--print-memory-usage
)

[build] Memory region         Used Size  Region Size  %age Used
[build]              RAM:        1608 B        20 KB      7.85%
[build]            FLASH:       18400 B        64 KB     28.08%

[Prabhuk]

Yep. It was implemented by @petrhosek https://reviews.llvm.org/D150644
@petrhosek -- can we close out this issue?

[llvmbot]

@llvm/issue-subscribers-lld-elf

Author: Prabhu Rajasekaran (Prabhuk)

`--print-memory-usage` flag in GNU ld gives a breakdown of the memory used in each of the memory regions defined in the linker file.

Having this feature will be useful in understanding the size impact especially in embedded systems and constrained targets.