Support arguments in shebang (#!)

Closes #199

See merge request redox-os/relibc!603

fix(ld.so): properly do copy relocations

See merge request redox-os/relibc!604

When scopes is set for `LD_DEBUG`, more debug information is displayed
now,

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

feat(ld.so): add support for DT_RELR

See merge request redox-os/relibc!602

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Does the same thing.

Signed-off-by: Anhad Singh <andypython@protonmail.com>

* -z pack-relative-relocs
* --sort-common
* --gc-sections

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

fix(ld.so): less locks

See merge request redox-os/relibc!601

Acquire the global scope lock at the start of relocate.

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Implement 'langinfo.h' and refactor strftime() to use langinfo constants

See merge request redox-os/relibc!599

feat(ld.so): performance improvements

See merge request redox-os/relibc!600

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Signed-off-by: Anhad Singh <andypython@protonmail.com>

Note that the ELF specification mandates the presence of either the GNU
hash table or SysV hash table. See Figure 2-7. Dynamic Array Tags.

Also both can be present, though that is not currently handled.

BLAZINGLY FAST!

Signed-off-by: Anhad Singh <andypython@protonmail.com>

fix: GNU seems to prefer its own glob.h

See merge request redox-os/relibc!598

- replaced hardcoded day and month names with calls to nl_langinfo,
- integrated langinfo constants  DAY_1, ABDAY_1, MON_1, ABMON_1) for weekday and month names,
- used AM_STR and PM_STR for AM/PM strings in %p and %P specifiers,
- add comments.