binfmt-detector-cli: rewrite to support PE32+ binaries (#38)

Rewrite with hard-coded offsets into the PE file format to discern
if a binary is PE32 or PE32+, and then to determine if it contains
a "CLR Data Directory" entry that looks valid.

Tested with PE32 and PE32+ compiled Mono binaries, PE32 and PE32+ native
binaries, and a random assortment of garbage files.

Former-commit-id: 9e7ac86ec84f653a2f79b87183efd5b0ebda001b

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/Facades/netstandard.dll.REMOVED.git-id

@@ -1 +0,0 @@
-37ae38bc77948371099f75c578aa7815f99befda

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/Mono.Cecil.dll.REMOVED.git-id

@@ -1 +0,0 @@
-a7842b0d6439c1ed3cf49515e4cf371d4235d0d8

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/Mono.Security.dll.REMOVED.git-id

@@ -1 +0,0 @@
-f15e745cae0bd0226a95100b7bfe1add9582fc58

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Configuration.dll.REMOVED.git-id

@@ -1 +0,0 @@
-af2bcff37c0f24112087149e301fb261fabc4412

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Core.dll.REMOVED.git-id

@@ -1 +0,0 @@
-8c1ae59f794d517e0511208df69360e468837145

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.IO.Compression.dll.REMOVED.git-id

@@ -1 +0,0 @@
-2c34f8b56659f040269bf0ad39b348362b98e299

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Numerics.dll.REMOVED.git-id

@@ -1 +0,0 @@
-08d65ee8bc37fafe3f3f6eea97e9d96fa2d8199f

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Security.dll.REMOVED.git-id

@@ -1 +0,0 @@
-8fe17831bca19203c8f9a5bdf3f17ded9af7b79b

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Xml.Linq.dll.REMOVED.git-id

@@ -1 +0,0 @@
-74cffef5c3b3ee82cf0cac64f167db5c63851204

mcs/class/lib/monolite-win32/1A5E0066-58DC-428A-B21C-0AD6CDAE2789/System.Xml.dll.REMOVED.git-id

@@ -1 +0,0 @@
-8791d56d91ca424d66773e6417afe1da9b4a4fe2